I really appreciate all of you who respond with helpful advice in this group! Even my Thai fiancé is now suggesting I "ask the farang group" for tips and suggestions. 😅
I've been to 3 different mall bank branches now (Kasikorn and Bangkok Bank) TRYING without success to open an account. Yes, I took my Thai fiance with me. As you know, having an account with "seasoned funds" is one of the requirements if I want to return to live here down the road. They said my passport is not enough. One asked for a work permit, which I don't have, and the others wanted some kind of "letter" from my embassy stating why I'm here and for how long, etc. I'm not sure my embassy (Canada) will provide such a letter or even know what it is.
If you've had recent success opening an account in Bangkok on a 90-day tourist visa, I would be grateful to know at what bank/branch location.